Welded end-slot connection and debonding layers for buckling-restrained braces

Keh Chyuan Tsai, An Chien Wu, Chih Yu Wei, Pao Chun Lin, Ming Chieh Chuang, Yi Jer Yu

研究成果: Article同行評審

48 引文 斯高帕斯(Scopus)

摘要

SUMMARY: The debonding mechanism has a significant effect on the performance of a buckling-restrained brace (BRB). In this paper, a method for estimating the compression strength adjustment factor for any given BRB core strain is presented. Experimental investigations were conducted on four BRBs to examine the efficiency of four different debonding materials in reducing the difference between the cyclic peak compression and tension. Test results indicate that chloroprene rubber is very easy to install and very effective in minimizing the difference between the compressive and tensile capacities. The excellent performance of 13 full-scale welded end-slot BRBs (WES-BRBs) is illustrated through experiments. Cyclic loading test results of a 12.5-m long jumbo WES-BRB reveal that its peak compressive strength exceeds 16,800kN and its maximum core strain reaches 0.035. All WES-BRBs show satisfactory performance with a very stable hysteresis response, modest peak compressive to tensile strength ratio, and very predictable axial stiffness. These specimens sustain a cumulative plastic deformation of greater than 400 times the yield deformation. The hysteresis responses can be satisfactorily predicted by using a two-surface plasticity analytical model. Advantages of the welded end-slot connections are also presented through a discussion on the effects of the BRB yield region length ratio on the effective stiffness, the yield story drift, and the core strain level.

原文English
頁(從 - 到)1785-1807
頁數23
期刊Earthquake Engineering and Structural Dynamics
43
發行號12
DOIs
出版狀態Published - 2014 十月 10

All Science Journal Classification (ASJC) codes

  • 岩土工程與工程地質
  • 地球與行星科學(雜項)

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